The invention provides a method for treating alopecia, impetigo or chilblain in a human, comprising positively finding balloon cells and multinucleated giant cells containing intranuclear eosinophilic inclusion bodies from a pathological specimen removed from said human by using a stain solution, and then administering to the human an anti-Herpes simplex virus (HSV) agent or a pharmaceutically acceptable salt thereof.本發明提供一種禿頭(alopecia)疾病、膿疱瘡(impetigo)或凍瘡(chilblain)等疾病治療方法,對於患有禿頭疾病、膿疱瘡或凍瘡之病人診斷是否有感染單純疱疹病毒,其中包括從人體取得之一病理標本,此病理標本經由染色液處理,從病理標本中尋找是否有氣球細胞和多核巨細胞的嗜酸性核內包涵體存在,然後給予一抗單純疱疹病毒之藥物或藥學上可接受的鹽類。400、402、404、406、408、410、412、414...步驟